I actually met DH in the US, he lived there for 14 years before coming back.
He adjusted more quickly than I have for sure. For one thing there was a huge expat community in the little town where we met, and he liked the amount of disposable cash and lack of class stucture. Not that the class structure doesn't exist in the US, but as an outsider he didn't recognise it. He was able to do things career wise that he felt he would never have been given the opportunity to do in the UK. As a result he now has a good career, even after moving back.
Mine is similar to Caligurl's. I met my English husband in the US. He never had a desire to move to the US; he went there on a job, met me, and ended up staying 12 years. He had several British expat friends. He had career opportunities in the US that he feels he might not have had if he'd stayed in the UK. The thing he missed most about the UK (like so many expats) was his family.
We lived in Atlanta. He adapted well to life there, but missed the English countryside. He didn't mind driving there. He hated the month of August (as did I) with it's heat, humidity, and smog. He disliked how some restaurants and cinemas over-air-conditioned in the summer so that we had to take jackets to wear when we got
inside.
The two items he always wanted shipped over were PG Tips and Cabury Fruit and Nut Bars. He never liked Hersheys chocolate, but gradually came to like Dove Promises. He doesn't like Weetabix.